Casing-spear.



W. WAGNER.

CASING SPEAR.

APPLICATION FILED JULY 21.1911.

Patented Oct. 23,1917. 7

Elwuemtoz WHRREN WHGNER,

WARREN AGNER, or s'rnawn, TEXAS.

oAsInG-srEAn.

To all whom it may concern:

Be it known that I, WARREN lVAoNnn, acitizen of the United States, residing at Strawn, in the county of Palo Pinto and State of Texas, have invented certain new and useful'lmprovements in Casing-Spears, of which the following is a specification, reference being had to the accompanying drawings. i

This invention relates to'certain improvements in casing spears and it is an object of the invention to provide a novel and im-' proved device of this general character which may be readily and conveniently employed for removing a casing from within a well and which may also be employed for removing a tool which may be dropped within the casing.

It is also an object of the invention to provide a novel and improved device of this general character including gripping slips which, when lowered within the casing are held in an inoperative position and wherein a mandrel is employed for releasing the slips when the spear has termined distance within the casing.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved casing spear wherein certain 'im-" portant advantages are attained and the de vice rendered simpler, less expensive and. otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitely claimed.

In order that my invention may be the better understood I will now proceed to describe the same with reference to the ac companying drawings wherein.

Figure 1 is a longitudinal sectional view illustrating a casing spear constructed in accordance with an embodiment of my invention and in applied position, certain of the slips being shown in an inoperative position; and

Fig. 2 is a longitudinal sectional view of the device as herein embodied, showing certain of the parts in a second position.

As disclosed in the accompanying drawings C denotes a well casing and T a tool therein which is adapted to be removed.

My improved spear as herein disclosed comprises a carrier 1 provided with a longitudinal bore 2 having its outer end portion been lowered a prede-v Specification of Letters Patent. Patented Oct 23, 191% Application filed. July 21, 1917. Serial No. 182,049.

3 threaded to aiiord a convenient engagement therewith by a rope socket or other deslred element. The inner end portion 4: of the bore of the carrier 1 is reduced and disposed through said reduced portion 4: is the mandrel 5 which extends'within the major portion of the bore 2 and which also extends beyond the inner end of the carrier 1.

Detachably engaged with the inner end portion of the carrier '1 is a socket '6 in threaded engagement with the reduced eX-' tension 7 arranged at the inner end of the carrier 1. The outer end portion of the socket 6 has its bore reduced as indicated at 8 on a predetermined taper and co-acting with the tapered portion8 are the slips 9 .adaptedto engage the toolT or the like to be removed. I

Resting upon the, inner ends of the slips 9 is an annular member or ring lO'snugly fitting within the bore of the socket 6 but capable of movement longitudinally of the bore thereof. The inner end portion of the bore of the socket is intersect-ed by the'pin 12 and interposed between the pin 12 and the annular member or ring 10 is the expansible member le herein disclosed as a' conventional type of coil spring. As is particularly illustrated in Fig. lithe pin 12 is removable and is adapted to be engaged within the transversely alined openings 15' spaced apart longitudinally of the socket 6 so that the compression or tension of'the GXPHlSllOlG memb'erlt'may be regulated in accordance with the necessities of practice.

' The "mandrel 5 also extends within the bore of the socket 6 and'in order that the pin 12 will offer no obstruction to the longitudinal movement of the mandrel 5, I provide said mandrel with the slot 16 through which they pin 12 is loosely directed. The slot 16 is of a length in excess of the extent of the inward movement of the mandrel.

The carrier 1 at diametrically opposed points is provided with the tapering or in-, clined seats 17 with which co-act the slips or gripping jaws 18. The slips or jaws 18 are provided with the longitudinally directed slots 19 in which extends the transverse bar or pin 20. The bar or pin 20 is also directed through a second slot 21 produced in the mandrel 5. The slot 21 is also of a length in excess of the extent of inward movement of the mandrel 5. Interposed between the bar or pin 20 and-the inner end of the bore 2 proper of the carrier 1 is an expansible member 22 herein disclosed as a coil spring encircling theman drel 5.

When my improved spear is to be lowered 7 within the casing C the mandrel 5 is forced downwardly and which results in moving in Fig. 1 and said mandrel is maintained in such position through the medium of the breakable pin insertible through the openings 24 produced in the carrier 1 and mandrel 5 and adapted to register when the slips or jaws 18 are in inoperative position. lVhen the spear operatively engages with the tool T the mandrel 5 will be moved upwardly or inwardly which results in a sev eranceof the pin 23. Upon the breaking of i the pin 23 the eXpansilole member 22 serves to move the pin or bar 2 1 upwardly resulting in the aws or sllps 18 operatlvely engaging the casing C as is particularly illustrated in Fig. 2. By this operation it will be at once self evident that upon removing the casing C the toolT will also be: withdrawn from within the well.

It will also be understood that by omitting theslips or jaws 18- my improved spear ean be employed wholly for the purpose of .removing the tool T. It will-also be self evident that by reversing my device from the 7 position illustrated in the accompanying zdrawlngs the aws or slips 18 may be em- .ployed to remove the casing.

Erom the foregoing ,description, it is I thought to be obviousrthat a casingspear V constructed in accordance with my 111V811 tion is particularly well adapted for use by. reason of the convenience and facility with which it may be assembled and operated and itrwill also beobvious that my invention is susceptible of somechange and modificationwithout materially departing from the principle and spirit thereofand for this reason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein tice. except as hereinafter claimed.

I claim:

1. A casing spear comprising a tubular carrier, a socket engaged therewith, engaging means carried by the socket, gripping jaws slidably engaged with the carrier, a mandrel positioned within the carrier and extending within the socket, said mandrel being provided with a longitudinally disposed slot, a transverse pin engageable with the jaws and loosely directed through the slot of the mandrel, anfeXpansib-le member constantly'urging the pin in one direction,

and breakable means co-acting with the carrier and mandrel for maintaining the latter normally against movement under the influence of the expansible member and for normally maintaining the expansible. member under compression.

2. A casing. spear comprising a tubularcarrier, a socketengaged therewith,,engag ing means carried by the socket, gripping jaws slidably engaged with the carrier, a mandrel positioned within the carrier and extending within the socket, said mandrel being provided with. a longitudinally disposed slot, a transverse pin engageable with the .j aws and loosely directed. through the slot of the mandrel, an expansible member constantly urging the pin in one direction, breakable means co-acting with the carrier and mandrel for maintainingth-e same n0r-- wflopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). C. v 

